Inductor-generator for ignition purposes.



H. J. PODLESAK & T. E. PODLESAK. INDUOTOR GENERATOR FOR IGNITIONPURPOSES. nrmouzonrmnn M128, 1908. RENEWED ran. 10. 1909.

947,647. Patented Jan. 25; 1910.

6% 78am 3% 63M 1 98 in woes uurrni) sTATEs PATENT OFFICE.

HENRY JOSEPH PonLssAK, or curcaoo, ILLINOIS, AND 'rnsna EMIL PODLESAK,or

' Momus'rowN, NEW JERSEY.

, INDUCTOR-GENERATOR FOR IGNITION PURPOSES.

Specification of Letters Patent. Patented J an. 25, 1910. Originalapplication filed September 25, 1901,,S er'ia1 No. 76,559. Divided andthis application filed January 28, 1908, Serial No. 413,070. RenewedFebruary 10, 1909. Serial No. 477,251.

To all whom it may concern:

Be it known that we, HENRY JOSEPH Ponnnsiu and TESLA-EMH. PonLnsAK,residing at Chicago, in the county of Cook and State of Illinois, andMorristown, county of Morris, State of New Jersey, respectively, haveinvented certain new and useful Improve mcnts in l nducttar-Generatorsfor Ignition Purposes, of which the following is a specification,reference being had therein to the accompanying drawings.v

This invention relates to inductor alternators for ignition purposes. Itessentially pertains to inductor alternators capable of producingelectrical effects suitable for the ignition of combustible charges ininternal combustion motors. It. is for a division of the subject mattershown and disclosed in our application for Letters Patent Serial No.76,559, filed September 25th, 1901.

The principal object of this invention is to provide an inductorgenerator adaptable for use in connection with a reversible motor, sothat the electric generator will pro duce the requisite electromotiveforce to cause a spark in the engine cylinder at the )roper instant,irrespective of the direction in which the crank shaft of the engine isrotating. r v

. Figure 1 is an edge elevation of an inductor generator embodying ourimprovement, a portion only of the inductor-carrying element beingshown. Fig. 2 is a side elevation of the. parts shown in Fig. 1. 'Fig. 3is a side elevation of the pole piece, detached. Fig. ft is aperspective view of the same.

In the dra\vings,-l indicates a permanent magnet preferably horseshoe orU- shaped in form. It is composed of as many I magnet sections, arrangedin series, as may bercquired to establish the desired density ofmagnetic field.

4 is a frame, preferably of non-magnetic material, and employed toposition and support ,in proper relation to each other the normallystationary parts of our inductor alternator.

9 are clamp oieces or cleats arranged to bear againstthe outermostmagnet section in the series, and 7 are bolts or screws extendingthrough said cleats and into the. frame 4, and adapted to clamp or bindthe said frame and permanent magnets together.

21 are pole pieces composed of a suitable member of punchings orlaminae. A pair of these pole pieces is preferably usechassembled, oneat either side of a suitable center piece or spacing piece 10 ofnonmagnetic material, and suitably bolted thereto by means of bolts Thisnonanagnetic spacing piece 10 is suitably secured to the frame at bymeans of bolts or screws 6 and ll,'so as to hold the laminated polepieces 21 in close magnetic contact with the ends orv poles of thepermanent magnet sections.

As shown, each one of the pole pieces has three polar projections, thecenter one of which serves as a coil core, and is indicated as 12, theones at either side of it being unwound and indicated as 12 and 12,respectively. A winding or coil 20 of insulated wire is slipped upon andsuitably secured to the middle polar projection or coil core on eachpole piece. The outer faces or polar faces of the .polar projections 12,12', and 12, are suitably shaped to conform to the path of travel of asuitable inductor, hereinafter described. Thepolar faces on the polarprojections 12, 12, are designated by 2, 2, respectively, andhereinafter referred -to as exciting polar faces, and the polar faces onthe polar pro ections 12, are designated by 3, and hereinafter referredto as generating polar faces.

19 is an inductor, preferably formed of punching s or laminae ofsuit-able metal. This inductor is adapted to be rotated in eitherdirection, so as to have one of its faces. pass over and closelyadjacent to the polar faces of the polar projections on the pole piecesby 'mere mechanical clearance, or, in other words, as close to saidpolar faces as mechanical conditions will 'permit-. The said inductor 19is connected with and car ried by a wheel or disk F, only part of whichis shown. This wheel F maybe of any suitable construction, and may bethe fly wheel of a motor, to the ignition apparatus of which, theinduction windings of the generator are connected. The polar faces 2,2', 3 and the face of the inductor which passes adjacent to them, arepreferably shaped to the arc of a circle struck from the axis of thewheel F as a center.

" Normally the lines of magnetic force emanate in a scattered way fromall sides of the magnet and for about one-half of its length from itsfree ends, and some of these lines of force emanate from the polepieces. The inductor 19, when rotated in clockwise direction, firstspans the exciting polar faces 2 and causes the concentration of a denseflow of magnetic lines of force, a substantial magnetic shorteireuit,between the polar projections 12 of the laminated pole pieces. Theinductor then moves across the air gap between the exciting polar faces2 and the generating polar faces 3 and causes a rapid and substantiallycomplete diversion of the magnetic flux density, first concentratedacross the exciting polar faces, into and through the coil cores 12 andacross the gene ating polar faces, so as to establish a substantialmagneticshort circuit across the generating polar faces. The inductorthen leaves the generating polar faces, crosses the air gap between themand the exciting polar faces 2, and the magnetic flux density throughthe induction windings is rap-idly diminished, a substantial magneticshort circuit being established outside of them.

If the inductor 19 is rotated in anti-clockwise direction, it firstconcentrates the lines of magnetic force across the exciting polar 1faces 2', 2, then across the generating polar faces, and then across theexciting'polar faces 2, 2. It will thus be seen that in either directionof rotation the inductor operates to bring about similar variations ofmagnetic flux density in the induction windings. This we have found tobe of great importance where our electric generator is used with areversible motor, as it insures-simi larly satisfactory ignition ineither direction of rotation of the motor.

with an inductor alternator constructed in accordance with ourinvention, the inductor does not at any time move sutliciently closelyto the limbs of the magnets themselves to draw or concentrate a densemagnetic flux across the limbs of the magnets above the poles thereof,but on the contrary,

we have so constructed and arranged the elements of an inductoralternator for ignition purposes, that the inductor in its operationtends only to draw or concentrate the magnetic flux emanating from themagnet oles at the said magnet poles, thereby tending to prevent theshiftin of the said poles and to overcome the ten eney of the said polesto shift, with the consequent loss of magneto-motive force by themagnets.

The elcctro-motive force is generated in the inductive windings 20, asin all dynamoelectric generators, by varying the magnetic flux densityin the said windings. The inductor 19 operates to cause a very rapidvarying of the -magn'etic flux density by first establishing asubstantial magnetic short circuit, 1'. 6., by-coneentrating the magnetic flux at a point adjacent to but outsi e unwound polar of theinduction windings, so that the magnetic flux density in the cores ofsaid windings is practically zero, then quickly diverting the magneticl'luxthrough thecoil cores, and then, practically instantly,establishing a magnetic short circuit outside of the coil, cores andcausing the magnetic flux density in said coil cores to again drop tosubstantially zero. l

\Vith multi-cylinder motors, two or more inductors are used, there beingone inductor for each cylinder, as will readily be understood, unlessthe periods of ignition of two or more of said cylinders occur at thesame period of the stroke at alternate revolutions.

In any casc, an inductor must be provided and so arranged that it willpass over and span the generating polar faces when the ignition of acombustible charge is required. Also, when the motor is arranged fortwoor more ignitions, usually termed late, early, el (1., it may provedesirable to use one inductor for each of such ignitions, and to mountand hold stationary the permanent magnet and induction windings.

What 'we claim isl. in an inductor generator for ignition purposes, thecombination of a permanent magnet, a pair of pole pieces each held inmagnetic contact with one pole of said magnet and having three polarprojections, a coil of wire in inductive relation to the middle polarprojections on said pole pieces, and an unwound inductor movablerelative to said polar prajcctionsto concentrate the magnetic fluxemanating from the polesof said magnet first outside of saidv wire woundpolar projections and between said pole pieces, then across said wirewound polar projections and then outside of said wire wound polarprojections and between said pole pieces in rapid sliccession.

2. [u an inductor generator for ignition purposes, the combination of afield magnet, a pair of pole pieces each in magnetic contact with one ofthe poles of said field magnet and having three polar projections, twocoils of wire, one in inductive relation to the middle polar projectionon one pole piece and the other in inductive relation to the middlepolar projection on the other pole piece, and an unwound inductormovable in either direction to concentrate between-said pole pieces themagnetic flux emanating from the. poles of said magnet, first acrossrejections, then across the said wound mid dle polar projections andthen across the other unwound polar projections.

1}. In an inductor generator for ignition purposes, the combination of apermanent magnet, laminated pole pieces'in magnetic contact with'the poes of'said magnet, each" pole piece having a coil core and polarprojectious with exciting polar faces on oppc site sides of said coilcore, coils of insulated Wire in inductive relation to said coil cores,anti 2:. laminated uiuvouncl inductor mounted on a rotatable support.

4. In an. inductor "for ignition purposes, the combination of apermanent netic contact. with one of j id magnet, one 0:? said polepieces carrying three polar pro ections having; po ar faces arranged inseries in the are of u circle, a coil of insulated KVlTQ in inductiverelation to the middle pole? projection cit saicl series, the polarpsoject-ions at either side of said middle one being unwound, and onincluctor rotatable in either direction relative the polar faces of saidpolur projections to in tei'ini'ttently establish subs iutiul inuneticshort circuits between each one of suiu pols projections and theopposite polo piece.

6. In an inductor generator ignition purposes, the combination of itpermanent magnet, u puirot pole pieces, each in mignctic contact withone of the magnet and having three polar projections each nrovidotl withpolar faces, on. induction Winding on the iniclclle projection of: eecione of sui pole pieces, and on unwound rotatable inrluctor shaped andC(HifilliKKl to the said polar on said pole pieces and ranged vlieurotated in either direction to firstconcentrate the lines of insu neticforce emanating from said, magnet poles between said pole pieces outsideof suiti iiniuction windings, then rapidly to divert tlie mug];- neticflux through Stiltl induction winding-3;, 21ml then as rapidly divertsoul magnetic poles of said flux outside of said induction windings,and. between said pole piece 7. In inductor generator for ignitiofipurposes, the combination of a lei-polar permanent ficlcl magnet, a pairof pole pieces, each held in magnetic contact with one o the-poles ofsaid field magnet and in suitable relation to each other, and eachhaving three polar projections, each of which terminates in e polarface, two'coils of Wire, each Wound in inductive relation on the middlepolar project ion of each said pole piece, a movable unwound inductor,arranged to establish, bv its movements, a magnetic path through itselfend alternately through the unwound pole; rojections and the Wound polarprojections of the said pole pieces.

8. in. an electric generator, the combination of e field. magnetprovided with pole pieces, three polar projections carried by one ofsaid pole pieces, a Winding on the middle polar projection, and anunwound inductor adapted cyclically to short-circuit the magneticfluxcutside of said winding, then (li--" vert the flux through saidWinding, and then again clivert the fiuX outside the windin z 9, in anelectric gejierstcl, the combinw tion of a field mugneupruviged withpole pieces, three polar projections carried by each of said. polepiecesQawind. on the middle polar projections, and on unwound inductoradapted cyclically to short-circuit the magnetic flux outside ofseiclvintlings, then divert the flux through isaid, windings, antltlienagain divert the flux outside windings. i

in. witness whereof We efiix our signatures, in the presence ofwitnesses. V

HENRY JOSEPH ?ODLESAK. TESLA. EMlL PODLESAK. Witnesses to the signatureof Henry Joseph Potllesztk:

J. QEJBEK, J. ToirAsnK. Witnesses to the signature Podlesak LILLIAN B.SHERMAN, JOHN H. BONSALL.

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